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Calibrating a transceiver circuit

a transceiver circuit and transceiver technology, applied in the direction of receiver monitoring, transmission monitoring, transmitter monitoring, etc., can solve the problems of poor analogue and rf performance compared with other specialized technologies, low cost of implementing digital functions,

Active Publication Date: 2015-12-31
LIME MICROSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a method for improving the performance of wireless communication circuits by adjusting the amplitude and phase of signals in the transmission and reception stages. This can be achieved by setting specific frequencies for the local oscillator signals and reference signal, and using filters to minimize power leakage and noise. The method can help to reduce interference and improve signal quality, leading to better overall performance of wireless communication devices.

Problems solved by technology

The key characteristic of the technology is the low cost for implementing the digital functions but poor analogue and RF performance compared with other specialized technologies.

Method used

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  • Calibrating a transceiver circuit
  • Calibrating a transceiver circuit
  • Calibrating a transceiver circuit

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Embodiment Construction

[0055]A simplified block diagram of the key structure and blocks within a typical 2×2 MIMO (multiple input, multiple output) integrated transceiver, used as an example here, are shown in FIGS. 1 to 3, although calibration algorithms are applicable generally to any N×M MIMO and also to MO (single input, single output) transceivers. Note that the transceiver signal processor (TSP) 10 of FIG. 1 contains the RXTSP (reception TSP) 11 and TXTSP (transmission TSP) 12 of FIGS. 2 and 3, respectively. The digital IQ (in-phase / quadrature) interface is used to interface the transceiver to a baseband circuit where the received data is processed and / or data is supplied to the transmitter for the up conversion to a radio frequency (RF) signal.

[0056]Regarding FIG. 1, one complete RX (reception) chain and one TX (transmission) chain of the example 2×2 MIMO transceiver will be used in the algorithm explanation. Calibration of other TX / RX chains in N×M MIMO transceivers is exactly the same and will no...

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Abstract

A method of calibrating a transceiver circuit including transmission circuitry for processing an input signal to produce an output signal including the input signal modulated onto a carrier signal, and reception circuitry arranged to take a modulated signal including a signal modulated onto a carrier signal and to output the signal demodulated from the carrier signal. The method includes: selectively coupling the transmission circuitry to the reception circuitry; introducing a reference signal into the transmission circuitry, the reference signal causing a plurality of components of different frequencies to be present in a calibration signal in the reception circuitry;measuring the power, and typically the received signal strength indication (RSSI) of the calibration signal including the plurality of components; and adjusting operation of the transmission and reception circuitry to increase the amplitude of a first set of the components relative to the amplitude of a second set of the components.

Description

FIELD OF THE INVENTION[0001]This invention relates to a method of calibrating a transceiver circuit and to a transceiver circuit.BACKGROUND OF THE INVENTION[0002]The proliferation of mobile communication devices including smart phones, notepads and laptops has resulted in significant efforts for efficient wireless transmission through adoption of new standards, hardware improvements and more sophisticated network management. As a result, there has been an ever increasing pressure to reduce cost, size and power consumption of such systems. This has driven designers to develop transceivers with higher levels of integration with much of the work focused on replacing the external components with integrated counterparts. This is not a trivial matter and often necessitates design of completely new transceiver architectures to achieve fewer off chip components.[0003]On the other hand, there is a very high demand for performance from the modern integrated transceivers in order to achieve hi...

Claims

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Application Information

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IPC IPC(8): H04B1/40H04B17/21H04B17/11
CPCH04B17/12H04B17/11H04B17/0085H04B1/40H04B17/21H04B17/00H04B17/14
Inventor MILENKOVIC, SRDJAN
Owner LIME MICROSYST